Magnitude 3.1 Earthquake of McLoud, Oklahoma USA 2013 June 17

2013-06-17 06:39:01 UTC : McLoud, Oklahoma USA EARTHQUAKE

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Magnitude: 3.1

Event Time: Time and Date Starting of Earthquake Rupture 

2013-06-17 06:39:01 UTC

2013-06-17 01:39:01 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.477°N 97.102°W

Depth : Depth of starting Rupture 

5.0km (3.1mi)

Region : McLoud, Oklahoma

Directions and Distances :Directions and Distances from Geographical Reference in Close Proximity Which can be effected by Location Uncertainty

a) 4km (2mi) NNW of McLoud, Oklahoma

b) 15km (9mi) E of Choctaw, Oklahoma

c) 23km (14mi) NW of Shawnee, Oklahoma

d) 26km (16mi) E of Midwest City, Oklahoma

e) 37km (23mi) E of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.6 Ml	± 0.06
Location	35.477°N, 97.102°W	± 9.4 km
Depth	5.0 km	± 3.0 km
Number of Phase Applied1	46
Minimum Distance2	18.9 km (0.17°)
Travel Time Residual3	1.18 sec
Azimuthal Gap4	63°

¹Number of phase Applied: 

In determining location of hypocenter, applied number of observations on P waves and S waves. The greater the more accurate prediction of EQ.

²Minimum Distance:

 Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.

³Travel Time Residual:

 A way of measurement of fit of arrival time observed to arrival time predicted for particular location. The smaller the better fit of data.

⁴Azimuthal Gap: 

Expressed in degree; the smaller the smaller the error in horizontal positioning of EQ. Large uncertainty is considered when exceeds 180° (both depth and location)